Measured 2026-10-22 (Asia/Shanghai) on GNUstep, not the Apple runtime.

oc-nsstring-append-hot — measured (oc-nsstring-append-hot.md + oc-nsstring-append-hot.jsonl); default stays off.
oc-nslog-hot — measured with an fprintf proxy (oc-nslog-hot.md + oc-nslog-hot.jsonl); default stays off.
oc-dateformatter-hot, oc-json-hot, oc-regex-hot — measured JSONL, default hint; not corpus-triaged. See each slug md for the ratio and the shape limit.
OC001 and OC004 are removed; tombstones are under _removed/.

Harness: examples/bench/evidence_oc.m. Policy: ../docs/evidence-policy.md. Root matrix: ../../../docs/rule-regression.md.

objcperf evidence